[R] Odp: Urgent Help with R calculation correlation coefficient

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 06.12.2010 11:02:03:

> 
> Hi,
> 
> I am trying to calculate correlation coefficient for gene expression 
data.
> 
> Tab delimited file looks like this
> 
> Id v1   v2    v3
> df 56   90    45
> gh 87   98    78
> ty 89    78    67
> 
> I used this code
> 
> 
> [code]
> 
> gse20437 <- read.csv("C:/Users//Desktop/data/GSE20437_matrix.txt",header 
=
> TRUE, sep = ",", strip.white = TRUE)
> 
> gsecor <- cor(gse20437, method ="pearson") or
> 
> gsecor <- cor(gse20437)
> 
> [/code]
> 
> i get error x must be numeric..
> 
> can anybody help me.

At least your Id column is not numeric. Do not use it for cor.

gsecor <- cor(gse20437[,-1])

Regards
Petr



> 
> thanks in advance
> 
> 
> 
> 
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